如何使用Jane Street的Core with Reason？

Question

我是OCaml的新手,我正试图尝试(:P)Facebook Reason语法.我无法找到一种方法来进行编译,因为如果找不到Core模块(已经安装了opam).

我正在尝试从Real World OCaml编译一个示例程序

open Core.Std;

let rec read_and_accumulate accum => {
  let line = In_channel.input_line In_channel.stdin;
  switch line {
    | None => accum
    | Some x => read_and_accumulate (accum +. Float.of_string x)
  }
};

let () = printf "Total: %F\n" (read_and_accumulate 0.);

这是我用于编译的命令:rebuild accum.native.

当我有这个_tags(来自https://janestreet.github.io/installation.html中的说明)

true: package(core,ppx_jane)
true: thread,debug

我的错误发生了变化,但我仍然不知道该怎么做:

File "_tags", line 1, characters 6-28:
Warning: tag "package" does not expect a parameter, but is used with parameter "core,ppx_jane"
File "_tags", line 1, characters 6-28:
Warning: the tag "package(core,ppx_jane)" is not used in any flag or dependency declaration, so it will have no effect; it may be a typo. Otherwise you can use `mark_tag_used` in your myocamlbuild.ml to disable this warning.
+ /Users/David/.opam/4.02.3/bin/ocamldep.opt -modules -pp refmt -impl accum2.re | tee accum2.re.depends accum2.ml.depends
accum2.re: Core Float In_channel
+ /Users/David/.opam/4.02.3/bin/ocamlc.opt -c -g -thread -pp '-g -thread' -pp refmt -o accum2.cmo -intf-suffix .rei -impl accum2.re
File "accum2.re", line 1, characters 5-13:
Error: Unbound module Core
Command exited with code 2.
Compilation unsuccessful after building 2 targets (0 cached) in 00:00:00.

使用Core with Reason需要做什么？

采用语法非常简单,我只阅读了几个小时,但是关于如何对非OCaml用户使用Reason的文档是零.

Answer 1

我猜rebuild是 ocamlbuild 的包装。只需使用参数调用即可-use-ocamlfind。